spring (not boot), tomcat, jsp hot reload not working (IJ 2023.2.2)

tried:

edit config: hot swap (and other options) on update and frame deactivation

settings, build/execute/deploy/compiler: build project automatically

advanced settings/compiler: allow auto-make to start even if deployed app is running

setting/compiler/resource patterns: added ".jsp"

cache disabled in browser

nothing works.. the other settings are identical to other projects where hot swap does work

in those apps (where hot swap does work) the edit config, setting, advanced settings, resource patterns were not need to be defined

also in other projects where this does work there is: <change beforePath> for every class and jsp in settings.xml in .idea folder

no idea how those entries were created, nor if thats the reason why it works in other projects

noteworthy: in IJ's internal tomcat ( users\me\appData\local\jetBrains\IntelliJIdea2023.2\tomcat\.. ), there is a non-empty

sub dir named after the exploded war application context that has sub dirs: \org\apache\WEB_002dINF\jsp

for the apps in which hot swap works, there are jsp (.class, .java) files there

however, for the app where hot swap does not work there are no such sub dirs nor files

ideas?